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Finding the Fourth Proportional to 139,989.57, 209,851.32 and 89,246.16

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Solution

The fourth proportional to 139,989.57, 209,851.32 and 89,246.16 is: 133,784.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,989.57 : 209,851.32 = 89,246.16 : x
  2. Step 2: Convert to fraction form
    139,989.57/209,851.32 = 89,246.16/x
  3. Step 3: Cross multiply
    139,989.57x = 209,851.32 × 89,246.16
  4. Step 4: Simplify right side
    139,989.57x = 18,728,424,480.93
  5. Step 5: Solve for x
    x = 18,728,424,480.93/139,989.57
  6. Step 6: Final answer
    x = 133,784.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.